Viruses are most intelligent mimicry organism straddle between the living and non-living organism. The viruses depend the host for the replication exists as protein coat or capsid. Viruses said to be does not have any nucleus, no organelles, no cytoplasm or cell membrane and non-cellular. Viruses have the either DNA or RNA has a genetic material and it can be either single or double strand DNA or RNA. Virus can infect any organism from plants to animal even the bacterial, fungal also.